- library
- semweb
- rdf_db.pl -- Core RDF database
 - rdf_cache.pl -- Cache RDF triples
 - rdfs.pl -- RDFS handling
 - rdf_persistency.pl -- RDF persistency plugin
 - rdf_litindex.pl -- Search literals
 - rdf_ntriples.pl -- Process files in the RDF N-Triples format
 - rdf11.pl -- RDF 1.1 API
 - sparql_client.pl -- SPARQL client library
 - turtle.pl -- Turtle: Terse RDF Triple Language
 - rdf_turtle_write.pl -- Turtle - Terse RDF Triple Language writer
 - rdf_http_plugin.pl -- RDF HTTP Plugin
 - rdf_library.pl -- RDF Library Manager
 - rdf_sandbox.pl -- Declare RDF API sandbox-safe
 - rdf_zlib_plugin.pl -- RDF compressed-data plugin
 
 
 - semweb
 
- rdf_cache_file(+URL, +ReadWrite, -File) is semidet
 - File is the cache file for URL. If ReadWrite is 
read, it returns the name of an existing file. Ifwriteit returns where a new cache file can be overwritten or created.